Where in Hong Kong can I buy Nikon D3000 lenses/flashes?

I'm going to HK in june/july & I have a Nikon D3000 & i want to know where i can buy lenses such as fish-eyes, wide angle & 18-55mm.
Also, are they relatively cheap & good quality?

Prices maybe higher than here in the US. Real Nikon products don't come cheap, period. If they're cheap, they're counterfeit. Nikon sells quality products, and with quality comes higher cost.
A Nikon fish eye lens will cost you more than the body.